import axios from 'axios'
import qs from 'qs'
import { Notification } from 'element-ui';

axios.defaults.timeout = 50000;  //响应时间
axios.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded;charset=UTF-8';        //配置请求头
axios.defaults.baseURL = 'api';   //配置接口地址

//POST传参序列化(添加请求拦截器)
axios.interceptors.request.use((config) => {
    //在发送请求之前做某件事
    if (config.method === 'post') {
        // 过滤掉null值字段
        config.data = qs.stringify(config.data, {
            filter: function (prefix, value) {
                if (value == null) {
                    return;
                }
                return value;
            }
        });
    }
    return config;
}, (error) => {
    console.log('错误的传参')
    return Promise.reject(error);
});

//返回状态判断(添加响应拦截器)
axios.interceptors.response.use((res) => {
    //对响应数据做些事
    if (res.data.code === 200) {
        return Promise.resolve(res);
    } else {
        if (res.data.msg) {
            Notification.closeAll();
            Notification.error(res.data.msg);
        } else {
            console.warn(res.data);
        }
    }
    throw "response error";
}, (error) => {
    Notification.error("网络异常");
    return Promise.reject(error);
});


//返回一个Promise(发送post请求)
export function fetchPost(url, params) {
    return new Promise((resolve, reject) => {
        axios.post(url, params)
            .then(response => {
                resolve(response.data);
            }, err => {
                reject(err);
            })
            .catch((error) => {
                reject(error)
            })
    })
}
//返回一个Promise(发送get请求)
export function fetchGet(url, param) {
    return new Promise((resolve, reject) => {
        axios.get(url, { params: param })
            .then(response => {
                resolve(response.data)
            }, err => {
                reject(err)
            })
            .catch((error) => {
                reject(error)
            })
    })
}


export default {
    fetchPost,
    fetchGet
}